Description:New York Jets "Sack Exchange" autographed Pro-Line football helmet. Top of the line Riddell VSR4 model Jets helmet signed by the famed New York Jets "Sack Exchange" defensive front four Mark Gastineau, Joe Klecko, Abdul Salaam, and Marty Lyons. Signed by all four in white paint pen along with "Sack Exchange" notation. Includes COA from PSA/DNA: NM